My speculatory assumption was that it only got really bad after the success of Walking Dead Season 1, as that was when Telltale started to heavily push for live-Season revisions as well as more ambitious game scope. Before Walking Dead, Telltale was at least good at punctuality and sticking more closely to their original vision throughout the Season.

Campo Santo just got bought out by Valve, so Jake and Sean essentially had a career trajectory of going from Telltale to Valve. Quite impressive!
https://kotaku.com/sources-valve-buys-firewatch-developer-campo-santo-1825445890

I think they have various alumni left, but no notable names come to mind at the moment. Laura Perusco also left a while back on Maternity Leave, which was eventually upped to her leaving altogether (I initially thought she was one of the people laid off).
I hope they take the opportunity to innovate on gameplay and be less complacent in that department. Johro makes some good points.
EDIT: Dan Connors stepped down a while back. For a while, Kevin Bruner was CEO, but he was recently replaced earlier this year with Pete Hawley.

People don't mind now, but when Season 2 and Wolf Among Us launched with a streamlined formula from Season 1 to be even more cinematic, even the modern-era Telltale fans that only joined during/after Season 1 pointed that out and were angry at the time. On top of that, Telltale also deliberately shortened their episodes from 2-3 hours for Season 1 to 90 minutes for Wolf/Season 2 to make episodes more streamlined and cinematic in pacing, so that made people even more angry. In the time since, Telltale has gotten back to making slightly longer episodes that range from 1:45 to 2:30, but even now, not even the modern fans like the change in gameplay from Season 1 to their newer titles. Rather, they just gave up on speaking out about it as much.
However, modern-era fans only blamed it on Telltale working on... [gasp] having multiple upcoming games coming soon at once (which is a trend that has gone on LONG before the era of Season 1), instead of recognizing that these were deliberate choices that Telltale made to make their games more cinematic. They think that the free-roam areas take more work than making the dialogue selection scenes which you have to choreograph, animate, voice over, etc.

As you guys might have heard, Telltale did a three episode DLC for Minecraft on top of the five Episode Season.
However, on top of that, they seem to strongly be hinting at a second Season to come on top of the first Season and its three episode DLC. Lots of references are being made to "Season 1" of Minecraft only as of lately from Telltale, and the final episode of the DLC is titled "A Journey's End?" - if you go on the game's site and read the episode description, it says this:
https://telltale.com/series/minecraft-story-mode---adventure-pass/
A Journeys End?
"The brilliant conclusion to Telltale's three episode Adventure Pass! Of course, there's that question mark..."
It seems that they are strongly hinting that another Season of Minecraft will eventually come down the line.

Dan Connors was CEO at the time, but Kevin Bruner was the one who was publicly posting about the downvotes, which led to people downvoting him.
However, downvotes were not removed until next Summer. It wasn't because of Kevin's downvotes, but rather, other users did not like downvotes either as they derailed threads and people did not have a common consensus on when to downvote something/what downvotes meant. Some people would downvote because they personally did not like what someone said/they disagreed with someone's opinion, others would downvote for someone being factually wrong about something, and some would downvote for trolling/spam etc. If someone who believed downvotes were for trolls/spam and got downvoted by someone else who though downvotes were for when you dissagreed with someone's opinion, the first person would get offended. It lead to lots of threads being derailed, and some people even ended up spamming upvote/downvote gifs from Reddit in threads to make jokes.

It was nice of Mashable to post their interview with Kevin Bruner today that revealed that The Walking Dead: Season Three is coming this year. You'd almost think the timing wasn't coincidental.
Haha, yeah, that was actually what I thought too. I even made a goal of posting it in the Minecraft Episode 5 waiting thread before the announcement. Still, though, the forums surprisingly aren't all too bad so far. I mean, Michonne is still live and in progress, so it's not like the Walking Dead fans aren't active right now.
I have to say, I'm glad it hasn't been bad so far!